Ice saw



. July 10, 1923. I

2 H w c m 0 E s m. D W r T. a c M d J m INVENTUR BY I WWW.

Patented July 10, I i

1 ICE saw." I

" mm saw wseet T 0 all whom Be it known thatI; Ronni tion. 7 V w This invention relates" to sawsiusedffor cutting ice while still in position on the surface of ,the river or other; body of ,watero'n which it has been formed; "Such" saws commonly comprisea bladeand ahandlesecured to one end of the blade, which is usually,

toothed to cut on the down stroke. 7 v Owing partly to the reductionof weight of the saw which results fromits working in the water below the ice, it is very difiicult to obtain a 'suflicient pressure of the saw against the ice for effective cutting andthe weight of the saw cannot conveniently be increased to increase the pressure, more parf ticularly as the saw must be used in anearly; vertical position in which its weight is nearly inoperative to aid in giving the de-.

sired pressure, a

My object, therefore,';isto devise means for pressing the saw against the ice both.-

during the upstroke and during thefdownstroke, thus enabling a double cutting blade Fig.1 is a side elevation of an ice 'saw constructed in accordance withimy invention' v I Fig. 2 is a front elevation of the same Fig. 3 a side elevation of the; movable vane; and

Fig. 4- a side elevation "of part of a'sawd.

showing a modified form of vane. I In the drawings like numerals of reference gures.

teeth adapted to cut with in either direction. I 4 r I Oneend of the saw is provided with a C D I QE. of'the'cityQLof Galt', in thejcfountyfofWater loo, Province 'of Ontario, Canada, asubject of the King of GreatiBritainfhave invented" certain new and useful Improvements in. Ice Saws, of whichithe following is specific??? 1 ofthe saw keriif' the weight of the indicate corresponding parts in the different f 1 is a saw blade, which is in the main of an ordinary type, butwhich is provided with .the saw moving b the vane as a solid block. a

6 Various othermodifications ofathe vane f land's anyi o y f r ii heeby may be e resi nin 5 rhegena ofthesawblade anagram are handle is provided iwithfa' vane. 3 adapted'td saw blade is moved longitudinally. I

smile t me;

being forced'tends to presstthe teeth of saw towards the ice at the bottom of the sawkerf. When -.the direction ofmovement of "the saw blade is reversed, the vane swings to the position vshown in dotted lines and 7 again the pressure of" the water "through: whichthe saw blade is being moved tends to press the teeth of'the saw against the bottom 0 In the preferred form *thi's-'vane''is"liinged a a thait yiswi a eads r wpxp i s:a-in li w ii h ii k a. de? fit S Wh ni he" wi' s :Pi h'e downward the vane, swings; t6 the position shown in full. lines, in F1g. '1, so-thatzthei pressure .of the water through which it is he I ' In the preferred construction "-ithehvane the best results. In the. drawings .an angle as probably givingfthe best results.

In F

comprises a plate notched 'or slittostra'ddle-j 1 the back of the saw, and a U-shaped member is welded thereto-which parallels the zsides of the notchand' is provided with eyes 5 in its ends through which and the. saw blade c. v passes a bolt 6 which formsa pivot for they a vane.',. The notch in the-vane is ofsuch a deptha'asto limit the swing of the: vane in either direction when the vane hasreached b such an angle as experience shows toygive" V 1 tionis shown inwhich the vane is-fixed and provided with an inclined 'surface 7: facing towardsone end of the saw and-an inclined surfacez8 facing towards the otherl end of i the saw, one being operative when the saw is moved in one/direction and the otherwhen' the saw is operated in. the other direction;

As these surfaces are so positioned that one :3 shields the other as the saw is moved 'l'engtha. -wise, the one has no. materialxtendency 'to neutralize the action ofthe other, yet, itc v -iwould be preferable to fill in the 'space be- I tween them, which is best done byforming 2. An ice saw having a vane attachment connected to its blade back of the teeth and adapted to press the saw againstits work when said blade is moved longitudinally in either direction. v

3. An ice saw having aswinglng vane connected to its blade adapted to press the saw against its work when said blade is. moved longitudinally in either direction.

41 An ice saw'having a vane attachment connected to and extending laterally vfrom each sidevo f its bladelback of the teeth and adapted to press the saw against its work when said blade is moved longitudinally.

each side of its blade back of the teeth and adapted to press the saw against its work when said blade is moved longitudinally in either direction. 2

'56. An icesaw having 'a swingi ng vane connected to. and extending laterally from each side of its blade adapted to press the saw against its: work-when said blade is moved longitudinally in either direction.

'7; An ice saw in combination with a vane having a notch formed therein extending in from one edge whereby the vane may be positioned straddling theback of -the saw blade; and 'means pivotally connecting the vane to the blade onv an axis transverse of the blade, the notch'ibeing of such a depth as to, by the engagennent' of its inner end with the back of the blade, limit the swing of the vane in either direction to positions inclined to the back of the blade.

Sig ed, at ,Galt, Ontario, this 7th day of March, 1922.: 5. An ice, saw having a vane attachment I connected to and extending laterally from JEROME Com triathlon- 

